Grid cap



D. CROPF GRID CAF FlediSept. 19, 1957 May 3, 1960 A if!! FIG.-

INVENToR,

o Avno cao PP ATTORNEY nited States 2,935,721 GRID CAP Y Y David Cropp, Warren, Pa., assigner to Warren Components Division, El-Tronics, Inc., Warren, Pa., a corporation of Pennsylvania Applicatian September 19, 1957, Serial No. 684,935 5 Claims. (Cl. 339-103) This invention relates to terminals and connectors and, more particularly, to grid caps for electronic tubes and to terminals for connecting an electrical conductor to a terminal of an electronic tube transistor or other electrical component.

Various connectors have been provided for making connections between an insulated wire and electrical components; however, these connectors have frequently been complex, expensive to manufacture, and subject to loosening during use.

It is, accordingly, an object of this invention to provide a connector for connecting an electrical conductor to an electrical component which is simple in construction, economical to manufacture, and simple `and efficient to use.

Another object of the invention is to provide a connector for an electrical conductor wherein the connector will overcome disadvantages and provide advantages not found in previous connectors.

A further object of this invention is to provide a connector for an insulated wire wherein the connector is attached to the insulated wire in an improved manner and the wire is connected to the connector by an im proved structure.

With the above and other objects in view, the present y invention consists of the combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawing and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportions, and minor details of construction without departing from the spirit or sacricing any of the advantages of the invention.

In the drawing:

Fig. 1 is a view of a connector attached to a wire and supported on an electrical component; and

Fig. 2 is a cross sectional view taken on line 2 2 of Fig. 1.

Now with more specilc reference to the drawing, Figs. 1 and 2 show a connector 10 which is generally hollow and cylindrical. 'Ilie connector 10 has a closed end 1.1 with an opening 12 punched through the closed end 11. Ends 13 are disposed around the opening 12 and may be formed by punching the opening 12 with a punching instrument. A conductor wire 14 is surrounded by an insulation sheath 15 and a bare end 16 of the wire 14 extends inwardly from a terminal end 17 of the insulation 15.

The end 16 of the wire 14 is bent Iaround and into engagement with the inside wall of the cylindrical cup shaped connector 10 at 18. A ring 19 is split at 20 and atent made of resilient material such as resilient metal with its free diameter greater than the internal diameter of the cylindrical connector 10 at 21 and, in the case of a stranded wire, will crush the wire as indicated at 21. Therefore, the ring 19 will lie substantially in engagement with the entire periphery of the connector 10.

The terminal of a transistor or other electrical component or electron control member is indicated generally at 30 and will be generally cylindrical and of substantially the same over-all diameter as the inside diameter of the cylindrical connector 10. An indented portion 23 formed in the side wall of the connector 10 will friction-4 ally engage the outer periphery of the terminal 30 and hold the connector 10 in firm clamped relation therewith. After the connector 10 has been assembled on the wire ice 14 shown in Fig. 2, the end 13 may be peened inwardly so that it will frictionally engage the insulation 15 at 24. Therefore, `any stress applied between the connector 10 4and the wire 14 will be transmitted to the insulation 15 and, therefore, the connection between the wire 14 and the connector 10 Will not be disturbed.

The yforegoing specification sets forth the invention in its preferred practical forms but the structure shown is cap-able of modification within a range of equivalents without departing from the invention which is to be understood is broadly novel as is commensurate with the appended claims.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

l. In combination, a connector and an insulated wire, an end of said wire protruding from said insulation, said connector being a hollow cylindrical connector closed at one end thereof and having a hole punched through said closed end, said wire and said insulation extending through said hole, the material around said hole being forced into sealing engagement with said insulation, said wire end engaging an inside wall of said connector, a split wire ring, said ring being disposed concentric to said cylindrical connector and forced thereinto holding said wire clamped against the inside edge thereof, and an inwardly extending indentation in a side wall of said connector for securing'said connector to an electrical terminal.

2. An electrical connector comprising a cup shaped connector member having an open end, the end opposite said open end being closed and having an opening punctured through said closed end with the material of said cup shaped member being flared inwardly, an insulated wire extending through said punctured opening with said insulation extending through said opening, a bared end of said wire engaging the inside wall of said connector member, and a ring Imade of -a Wire of resilient material forced into said connector member with said wire between said ring and said connector member and clamping said wire to said connector member.

3. The connector recited in claim 2 wherein said ared material around said opening is forced against said insulation and thereby clamped in engagement therewith.

4. The connector recited in claim 3 wherein said ring is cut through, providing a split ring, and, in its free position, said ring is of larger diameter than when said split is closed. Y

5. A connector for use with -a terminal of an electrical component, said connector comprising a cup shaped connector member, a split ring, and an insulated wire, said connector member being closed at one end thereof, an

opening in said closed end, the insulation on said wire extending over a substantial portion of said wire and through said opening in said closed end, the material of said connector member being peened into locking engagement with said insulation, said split ring made of resilient wire material and having a free diameter greater than the internal size of said connector and disposed in said connector, a bare end of said wire being disposed and held clamped between said ring and the inside wall of said connector, said connector fitting over a terminal of said component, and an indented portion on said connector forcing said connector outwardly and thereby frictionally securing said connector to said component.

References Citedvin the file of this patent-Y UNlTED STATES PATENTS 1,735,656 Rossi Nov. l2, 1929 2,453,172 Wilkie Nov. 9, 1948 2,549,577 Coyle Apr. 17, 1951 2.677.118 Stone -..T Apr. 27, 19.54 

